Research and Education in Mechanical Tolerancing and Dimensional Metrology

机械公差和尺寸计量的研究和教育

• 批准号: 9115435
• 负责人: Herbert Voelcker
• 金额: $ 36.07万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115435&HistoricalAwards=false
• 关键词: Research; Education; Mechanical; Tolerancing; Dimensional

Recent national studies have identified serious deficiencies in mechanical tolerancing and metrology standards and practices, and in the teaching of these in universities, training institutes, and industry. The central problem underlying all of these deficiencies is the lack of proper scientific foundations for mechanical tolerancing. In essence, tolerancing and metrology evolved from shop-floor practice, and are taught and applied as collections of special-case techniques. This project pursues four related lines of research to improve this situation: (1) development of a semi-formal mathematical codification for the main principles of the ANSI Y14.5 tolerancing standard, initially in the form of a monograph and/or course notes for engineering students; (2) extension of the codification with mathematical and computational techniques for analyzing the accumulation of geometric tolerances (i.e., generalization of one- dimension tolerance stacking). Such techniques are important in design for assembly; (3) linking of the codification to metrology practices, with selective research on open issues in dimensional and surface modeling; and (4) exploratory research in functional tolerancing (i.e., control of the effects of spatial variability on the performance of designed artifacts).

最近的国家研究发现了严重的缺陷 在机械公差和计量标准和实践中， 在大学，培训机构， 和行业 所有这些背后的核心问题是 不足之处是缺乏适当的科学基础， 机械公差 本质上，公差和计量 从车间实践中发展而来，并作为 特殊案例技术的集合。 该项目追求四个相关的研究路线，以提高 这种情况：（1）发展一种半形式数学 ANSI Y14.5公差主要原则的编码 标准，最初以专著和/或课程笔记的形式 （2）扩大编纂范围， 用于分析的数学和计算技术 几何公差的累积（即，一个人的概括- 尺寸公差叠加）。 这些技术对于 装配设计;（3）编码与计量的结合 实践中，有选择地研究开放的问题，在维 和曲面造型;（4）功能性的探索性研究 公差（即，控制空间变异的影响 关于设计工件的性能）。